kubernetes常用资源——job/cronjob

k8s-job/cronjob

1、job(初始化数据库等操作，只执行一次)

[root@haproxy1 case2-job]# cat 1.job.yaml 
apiVersion: batch/v1
kind: Job
metadata:
  name: job-mysql-init
  namespace: test
spec:
  template:
    spec:
      containers:
      - name: job-mysql-init-container
        image: centos:7.9.2009
        command: ["/bin/sh"]
        args: ["-c", "echo data init job at `date +%Y-%m-%d_%H-%M-%S` >> /cache/data.log"]
        volumeMounts:
        - mountPath: /cache
          name: cache-volume
      volumes:
      - name: cache-volume
        hostPath:
          path: /tmp/jobdata
      restartPolicy: Never

2、cronjob（周期性执行任务，数据备份，同步等操作）

[root@haproxy1 case2-job]# cat 2.cronjob.yaml 
apiVersion: batch/v1
kind: CronJob
metadata:
  name: cronjob-mysql-databackup
spec:
  #schedule: "30 2 * * *"
  schedule: "* * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: cronjob-mysql-databackup-pod
            image: centos:7.9.2009
            #imagePullPolicy: IfNotPresent
            command: ["/bin/sh"]
            args: ["-c", "echo mysql databackup cronjob at `date +%Y-%m-%d_%H-%M-%S` >> /cache/data.log"]
            volumeMounts: 
            - mountPath: /cache
              name: cache-volume
          volumes:
          - name: cache-volume
            hostPath:
              path: /tmp/cronjobdata
          restartPolicy: OnFailure